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Ethylene-vinyl Acetate EVA

EVA is synthesized by copolymerization of ethylene and acetic acid. The Chinese chemical name: ethylene vinyl acetate copolymer (ethylene vinyl acetate copolymer) is widely used in the field of application of the English chemical name: Ethylene Vinyl Acetate Copolymer.EVA. The market consumption of our country is increasing every year, especially in the shoemaking industry, which is used in the middle and high grade travel shoes, mountaineering shoes, slippers, sandals' soles and interior materials.

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Description of Goods:

EVA is synthesized by copolymerization of ethylene and acetic acid. The Chinese chemical name: ethylene vinyl acetate copolymer (ethylene vinyl acetate copolymer) is widely used in the field of application of the English chemical name: Ethylene Vinyl Acetate Copolymer.EVA. The market consumption of our country is increasing every year, especially in the shoemaking industry, which is used in the middle and high grade travel shoes, mountaineering shoes, slippers, sandals' soles and interior materials.

 

Characteristic(s):

EVA is widely used in foaming shoes, functional plastic film, packaging mold, hot melt adhesive, wire, cableand toys.

1.EVAwhose content of ethylene acetate is less than 5%, its main products are film, cable and wire LDPE modifier, adhesive and so on;

(2) the EVA with ethylene acetate content of 5% and 10% is elastic film, etc.

(3) Ethylene acetate content is 20 ~ 28% EVA, which is mainly used for hot melt adhesive and coating products.

 

Main feature:

(1) POE has the general physical properties of thermoplastic elastomer, such as molding, waste recycling and vulcanization properties.

(2) the price is low and the relative density is small, so the price is low.

(3) excellent heat resistance, cold tolerance and wide range of use.

(4) good weather resistance and good aging resistance.

(5) resistance to oil, permanent deformation of compression and abrasion resistance, etc.

 

Polymerization of EVA:

 

1. High pressure bulk polymerization (plastics)

2. Solution Polymerization PVC processing Additives)

3, emulsion polymerization (adhesive products)

4, suspension polymerization

The vinyl acetate (va) content is higher than 30% by emulsion polymerization.

The low content of vinyl acetate via high pressure bulk polymerization.

 

Main factors affecting EVA performance:

 

1, Melt Index melting index (MI, soluble finger for short) 

Content of EVA% acetic Acid

 

The higher the content of va, the higher its elasticity, softness, compatibility and transparency, and when the content of VA decreases, its performance is close to that of PE, rigidity, wear resistance and electrical insulation.

 

With the constant content of VA, the softening point decreased, the processability and the surface gloss improved, but the strength decreased. Otherwise, with the decrease of MI, the molecular weight increased, the impact property and the environmental stress cracking resistance increased.

 

EVA is characterized by good flexibility, rubber elasticity, flexibility, transparency and surface gloss at -50 ℃, good chemical stability, good anti-aging and ozone resistance, and no toxicity. Good mixing, coloring and molding properties with fillers.

 

The polarity of acetate increases elasticity and viscosity, decreases crystallinity and electrical properties, and dissolves in hydrocarbons and oils.

 

Application:

(1) it is widely used in foamed shoe materials, functional greenhouse films, packaging models, hot-melt adhesives, wire and cable and toys.

(2) the EVA with ethylene acetate content of 5% and 10% is elastic film, etc. 

(3) Ethylene acetate content is 20 ~ 28% EVA, which is mainly used for hot melt adhesive and coating products.

 

The main products are film (including agricultural film) and sheet, injection molding, molding products, foaming products, hot melt adhesive, etc.

 

Foaming shoes. Shoe material is the main application field of EVA resin in China. In the EVA resin used in footwear, the vinyl acetate content is generally 15% 22. Because of its softness, elasticity and chemical corrosion resistance, EVA resin blend foaming products are widely used in the soles and interior materials of middle and high grade travel shoes, mountaineering shoes, slippers and sandals. In addition, this material is used in the field of sound insulation, gymnastic mats and sealing materials.

 

The main purpose of EVA film is to produce functional shed film. The functional shed film has high weathering resistance, anti-fog droplet and heat preservation properties. Because polyethylene does not have polarity, even if a certain amount of antifogging agent is added, the anti-fogging property can only be maintained for about 2 months. The greenhouse film made by adding a certain amount of EVA resin not only has higher transmittance, but also has a great improvement of anti-fog droplet performance, which can generally exceed 4 months. In addition, EVA can also be used to produce packaging film, medical film, laminate film, casting film and so on.

 

Wire and cable. With the development of computer and network engineering, more and more halogen-free flame retardant cables and silane cross-linked cables are used for the safety of computer room. EVA resin is widely used in halogen-free flame retardant cables, semiconductor shielded cables and two-step silane cross-linked cables because of its good filler inclusiveness and crosslinking ability. In addition, EVA resin is also used in the manufacture of some special cable sheath. EVA resin used in wire and cable, vinyl acetate content is generally at 12 / 24.


Eva resin also has more applications in toys, such as child wheel, cushion and so on.

Hot melt adhesive. The hot melt adhesive with EVA resin as the main component is widely used in the wireless binding of books and the sealing of furniture because it contains no solvent, does not pollute the environment and is safe, so it is very suitable for the production of automatic assembly line. Automotive and household appliances assembly, shoe making, carpet coating and metal anticorrosion coating.

 

(6) other.EVA resins are also widely used in areas such as inks, bags, bottle covers and so on. It is estimated that these resins consume less than 15 kt. of EVA resin.


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Packing & Storage:

Packing:25kg pp bags.

Storage:Storage should be stored in a dry, well-ventilated warehouse to prevent direct sunlight exposure and should not be stored in the open air.Should not be stored or shipped with chemicals and inflammables.


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